Experimental investigation of surface roughness of EN 353 on EDM with hollow tool

ANISH, KUMAR and R. D., GUPTA, and TEEPU, SULTAN (2014) Experimental investigation of surface roughness of EN 353 on EDM with hollow tool. In: International Conference on Advances In Engineering And Technology - ICAET 2014, 24 - 25 May, 2014, RIT, Roorkee, India.

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Abstract

Electrical discharge machining (EDM) is one of the earliest non-traditional machining, extensively used in industry for processing of parts having unusual profiles with reasonable precision. In the present work, an attempt has been made to model Surface Roughness (SR) through Response Surface Methodology (RSM) in a die sinking EDM process. The optimization was performed in two steps using one factor at a time for preliminary evaluation and a Box-Benken design (BBD) involving three variables (Pulse on-Time, Pulse off-Time and Pulse Current) with three levels for determination of the critical experimental conditions. A copper electrode having tubular cross section was employed to machine holes of 8 mm height and 12 mm diameter on EN 353 Steel alloy workpiece. The results of analysis of variance (ANOVA) indicated that the proposed mathematical models obtained can adequately describe the performances within the limits of factors being studied. The experimental results reveal that interaction effect of Pulse Current and Pulse Off Time on SR yielding a wide range from 4.28 to 10.16 µm, while Pulse Current remains the most contributing factor. Surface topography is revealed with the help of scanning electron microscope (SEM) micrographs.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: EDM, hollow tool, response surface methodology, surface roughness, SEM.
Depositing User: Mr. John Steve
Date Deposited: 27 May 2019 04:43
Last Modified: 27 May 2019 04:43
URI: http://publications.theired.org/id/eprint/2729

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